140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/**
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* @file ts2phc_phc_master.c
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* @note Copyright (C) 2019 Richard Cochran <richardcochran@gmail.com>
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* @note SPDX-License-Identifier: GPL-2.0+
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*/
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#include <linux/ptp_clock.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include "config.h"
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#include "phc.h"
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#include "print.h"
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#include "missing.h"
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#include "ts2phc.h"
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#include "ts2phc_master_private.h"
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#include "util.h"
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struct ts2phc_phc_master {
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struct ts2phc_master master;
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struct clock *clock;
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int channel;
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};
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static int ts2phc_phc_master_activate(struct config *cfg, const char *dev,
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struct ts2phc_phc_master *master)
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{
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struct ptp_perout_request perout_request;
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struct ptp_pin_desc desc;
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int32_t perout_phase;
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int32_t pulsewidth;
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struct timespec ts;
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memset(&desc, 0, sizeof(desc));
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master->channel = config_get_int(cfg, dev, "ts2phc.channel");
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desc.index = config_get_int(cfg, dev, "ts2phc.pin_index");
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desc.func = PTP_PF_PEROUT;
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desc.chan = master->channel;
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if (phc_pin_setfunc(master->clock->clkid, &desc)) {
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pr_warning("Failed to set the pin. Continuing bravely on...");
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}
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if (clock_gettime(master->clock->clkid, &ts)) {
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perror("clock_gettime");
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return -1;
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}
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perout_phase = config_get_int(cfg, dev, "ts2phc.perout_phase");
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memset(&perout_request, 0, sizeof(perout_request));
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perout_request.index = master->channel;
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perout_request.period.sec = 1;
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perout_request.period.nsec = 0;
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perout_request.flags = 0;
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pulsewidth = config_get_int(cfg, dev, "ts2phc.pulsewidth");
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if (pulsewidth) {
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perout_request.flags |= PTP_PEROUT_DUTY_CYCLE;
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perout_request.on.sec = pulsewidth / NS_PER_SEC;
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perout_request.on.nsec = pulsewidth % NS_PER_SEC;
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}
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if (perout_phase != -1) {
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perout_request.flags |= PTP_PEROUT_PHASE;
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perout_request.phase.sec = perout_phase / NS_PER_SEC;
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perout_request.phase.nsec = perout_phase % NS_PER_SEC;
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} else {
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perout_request.start.sec = ts.tv_sec + 2;
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perout_request.start.nsec = 0;
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}
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if (ioctl(CLOCKID_TO_FD(master->clock->clkid), PTP_PEROUT_REQUEST2,
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&perout_request)) {
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pr_err(PTP_PEROUT_REQUEST_FAILED);
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return -1;
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}
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return 0;
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}
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static void ts2phc_phc_master_destroy(struct ts2phc_master *master)
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{
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struct ts2phc_phc_master *m =
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container_of(master, struct ts2phc_phc_master, master);
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struct ptp_perout_request perout_request;
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memset(&perout_request, 0, sizeof(perout_request));
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perout_request.index = m->channel;
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if (ioctl(CLOCKID_TO_FD(m->clock->clkid), PTP_PEROUT_REQUEST2,
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&perout_request)) {
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pr_err(PTP_PEROUT_REQUEST_FAILED);
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}
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clock_destroy(m->clock);
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free(m);
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}
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static int ts2phc_phc_master_getppstime(struct ts2phc_master *m,
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struct timespec *ts)
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{
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struct ts2phc_phc_master *master =
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container_of(m, struct ts2phc_phc_master, master);
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return clock_gettime(master->clock->clkid, ts);
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}
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struct clock *ts2phc_phc_master_get_clock(struct ts2phc_master *m)
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{
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struct ts2phc_phc_master *master =
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container_of(m, struct ts2phc_phc_master, master);
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return master->clock;
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}
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struct ts2phc_master *ts2phc_phc_master_create(struct ts2phc_private *priv,
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const char *dev)
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{
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struct ts2phc_phc_master *master;
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master = calloc(1, sizeof(*master));
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if (!master) {
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return NULL;
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}
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master->master.destroy = ts2phc_phc_master_destroy;
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master->master.getppstime = ts2phc_phc_master_getppstime;
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master->master.get_clock = ts2phc_phc_master_get_clock;
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master->clock = clock_add(priv, dev);
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if (!master->clock) {
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free(master);
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return NULL;
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}
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master->clock->is_destination = 0;
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pr_debug("PHC master %s has ptp index %d", dev,
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master->clock->phc_index);
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if (ts2phc_phc_master_activate(priv->cfg, dev, master)) {
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ts2phc_phc_master_destroy(&master->master);
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return NULL;
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}
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return &master->master;
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}
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